Transmission configuration indicator state activation techniques for carrier aggregation

Abstract

Methods, systems, and devices for wireless communications are described in which different component carriers (CCs) or bandwidth parts (BWPs) of a system operating according to carrier aggregation may be configured with different transmission configuration indicator (TCI) states. A base station may transmit control information to a user equipment (UE) to activate two or more CCs, and that indicates two or more different sets of TCI states that are activated for the two or more CCs. The control information may be transmitted to the UE in a single MAC-CE. The single MAC-CE to activate different sets of TCI states at CCs or BWPs may allow for a reduced number of MAC-CEs used for conveying the set of active TCI states for the CCS or BWPs.

What is claimed is: 
     
       1. A method for wireless communication at a user equipment (UE), comprising:
 receiving a medium access control-control element (MAC-CE) that indicates, for a plurality of component carriers configured for the UE, a first set of one or more transmission configuration indicator (TCI) states, wherein the MAC-CE comprises an indication of one or more TCI state identifiers (IDs), each TCI state ID of the one or more TCI state IDs is associated with a first component carrier identified by the MAC-CE and with one or more additional component carriers not identified by the MAC-CE, and wherein the first component carrier and the one or more additional component carriers are of the plurality of component carriers; and 
 activating a same set of TCI states of the first set of one or more TCI states for a subset of component carriers of the plurality of component carriers based at least in part on the received MAC-CE and the indication of the one or more TCI state IDs, wherein the subset of component carriers comprises the first component carrier. 
 
     
     
       2. The method of  claim 1 , wherein each TCI state ID of the one or more TCI state IDs is associated with a component carrier identification and a bandwidth part identification. 
     
     
       3. The method of  claim 1 , further comprising:
 identifying two or more mappings of TCI states for the plurality of component carriers; 
 receiving, in the MAC-CE, an activation command for a first mapping associated with the same set of TCI states from the first set of one or more TCI states; and 
 activating the same set of TCI states based at least in part on the first mapping. 
 
     
     
       4. The method of  claim 3 , wherein the activation command for the same set of TCI states indicates one or more bandwidth part identifications, and an identification of the same set of TCI states. 
     
     
       5. The method of  claim 4 , wherein the first mapping is received from a network entity in radio resource control signaling. 
     
     
       6. The method of  claim 1 , wherein each of the plurality of component carriers has an associated set of TCI state IDs, and a same TCI state ID for each of the plurality of component carriers in a millimeter wave frequency band has same corresponding spatial quasi-colocation parameters. 
     
     
       7. The method of  claim 1 , wherein each TCI state of the first set of one or more TCI states associated with the plurality of component carriers and bandwidth parts in a sub-6 GHz frequency band uses a same Doppler or delay-related quasi-colocation reference signal as a bandwidth part associated with an activated TCI state. 
     
     
       8. The method of  claim 1 , further comprising:
 communicating with a network entity using at least a portion of the subset of component carriers based at least in part on the activating. 
 
     
     
       9. The method of  claim 1 , wherein the indication of the one or more TCI state IDs indicates, for which one or more individual TCI state IDs of the one or more TCI state IDs, a corresponding TCI state of the first set of one or more TCI states is to be activated. 
     
     
       10. A method for wireless communication at a network entity, comprising:
 identifying a medium access control-control element (MAC-CE) that indicates, for a plurality of component carriers configured for a user equipment (UE), a first set of one or more transmission configuration indicator (TCI) states, wherein the MAC-CE comprises an indication of one or more TCI state identifiers (IDs), each TCI state ID of the one or more TCI state IDs is associated with a first component carrier identified by the MAC-CE and with one or more additional component carriers not identified by the MAC-CE, and wherein the first component carrier and the one or more additional component carriers are of the plurality of component carriers; 
 determining that a same set of TCI states of the first set of one or more TCI states for a subset of component carriers of the plurality of component carriers is to be activated based at least in part on the identified MAC-CE and the indication of the one or more TCI state IDs, wherein the subset of component carriers comprises the first component carrier; and 
 transmitting the MAC-CE. 
 
     
     
       11. The method of  claim 10 , wherein each TCI state ID of the one or more TCI state IDs is associated with a component carrier identification and a bandwidth part identification. 
     
     
       12. The method of  claim 10 , further comprising:
 identifying two or more mappings of TCI states for the plurality of component carriers; and 
 transmitting, in the MAC-CE, an activation command for a first mapping associated with the same set of TCI states from the first set of one or more TCI states. 
 
     
     
       13. The method of  claim 12 , wherein the activation command for the same set of TCI states indicates one or more bandwidth part identifications, and an identification of the first mapping. 
     
     
       14. The method of  claim 13 , wherein the two or more mappings are transmitted in radio resource control signaling. 
     
     
       15. The method of  claim 10 , wherein each of the plurality of component carriers has an associated set of TCI state IDs, and a same TCI state ID for each of the plurality of component carriers in a millimeter wave frequency band has same corresponding spatial quasi-colocation parameters. 
     
     
       16. The method of  claim 10 , wherein each TCI state of the first set of one or more TCI states associated with the plurality of component carriers and bandwidth parts in a sub-6 GHz frequency band uses a same Doppler or delay-related quasi-colocation reference signal as a bandwidth part associated with an activated TCI state. 
     
     
       17. The method of  claim 10 , further comprising:
 communicating with the UE using at least a portion of the subset of component carriers based at least in part on the determining. 
 
     
     
       18. The method of  claim 10 , wherein the indication of the one or more TCI state IDs indicates, for which one or more individual TCI state IDs of the one or more TCI state IDs, a corresponding TCI state of the first set of one or more TCI states is to be activated. 
     
     
       19. A method for wireless communication at a user equipment (UE), comprising:
 receiving a medium access control-control element (MAC-CE) from a network entity that indicates, for a plurality of component carriers configured for the UE, two or more sets of transmission configuration indicator (TCI) states, wherein the MAC-CE comprises an indication of one or more TCI state identifiers (IDs), each TCI state ID of the one or more TCI state IDs is associated with a first component carrier identified by the MAC-CE and with one or more additional component carriers not identified by the MAC-CE, and wherein the first component carrier and the one or more additional component carriers are of the plurality of component carriers; and 
 activating a first set of TCI states for the first component carrier and a second set of TCI states for a second component carrier based at least in part on the received MAC-CE and the indication of the one or more TCI state IDs. 
 
     
     
       20. The method of  claim 19 , wherein each TCI state ID of the one or more TCI state IDs is associated with a component carrier identification and a bandwidth part identification. 
     
     
       21. The method of  claim 19 , further comprising:
 receiving, in the MAC-CE, an activation command for the first component carrier, the activation command including a first bit that is set to indicate that different sets of TCI states are activated for different component carriers of the plurality of component carriers. 
 
     
     
       22. The method of  claim 21 , further comprising:
 identifying, based at least in part on the activation command for the first component carrier, a first TCI state; 
 identifying a first reference signal ID associated with the first TCI state; and 
 activating one or more TCI states of at least the second component carrier that are associated with the first reference signal ID. 
 
     
     
       23. The method of  claim 22 , further comprising:
 activating TCI states that are associated with the first reference signal ID of each remaining component carrier of the plurality of component carriers; and 
 repeating the activating for one or more other TCI states provided in the MAC-CE that include the first bit that is set to indicate that different sets of TCI states are activated in the plurality of component carriers. 
 
     
     
       24. The method of  claim 19 , further comprising:
 identifying two or more mappings of TCI states for the first component carrier and the second component carrier; 
 receiving, in the MAC-CE, an activation command for a first mapping associated with the first set of TCI states; and 
 activating the first set of TCI states for the first component carrier based at least in part on the first mapping, wherein the activation command for the first set of TCI states indicates one or more bandwidth part identifications, and an identification of the first set of TCI states. 
 
     
     
       25. The method of  claim 19 , wherein each of the plurality of component carriers has an associated set of TCI state IDs, and a same TCI state ID for each of the plurality of component carriers in a millimeter wave frequency band has same corresponding spatial quasi-colocation parameters. 
     
     
       26. The method of  claim 19 , wherein each TCI state associated with the plurality of component carriers and bandwidth parts in a sub-6 GHz frequency band uses a same Doppler or delay-related quasi-colocation reference signal as a bandwidth part associated with an activated TCI state. 
     
     
       27. A method for wireless communication at a network entity, comprising:
 determining, for communications with a user equipment (UE), a first set of transmission configuration indicator (TCI) states for a first component carrier of a plurality of component carriers and a second set of TCI states for a second component carrier of the plurality of component carriers; and 
 transmitting a medium access control-control element (MAC-CE) that indicates, for the plurality of component carriers, the first set of TCI states and the second set of TCI states, wherein the MAC-CE comprises an indication of one or more TCI state identifiers (IDs), each TCI state ID of the one or more TCI state IDs associated with the first component carrier identified by the MAC-CE and with one or more additional component carriers not identified by the MAC-CE, and wherein the first component carrier and the one or more additional component carriers are of the plurality of component carriers. 
 
     
     
       28. The method of  claim 27 , wherein each TCI state ID of the one or more TCI state IDs is associated with a component carrier identification and a bandwidth part identification. 
     
     
       29. The method of  claim 27 , further comprising:
 transmitting, in the MAC-CE, an activation command for the first component carrier, the activation command including a first bit that is set to indicate that different sets of TCI states are activated for different component carriers of the plurality of component carriers. 
 
     
     
       30. The method of  claim 29 , the activation command indicating a first TCI state for the first component carrier having a first reference signal ID, and one or more TCI states of at least the second component carrier that are associated with the first reference signal ID being activated. 
     
     
       31. The method of  claim 27 , further comprising:
 transmitting configuration information that indicates a subset of available TCI states, the subset being less than a total number of configurable TCI states; and 
 the MAC-CE explicitly indicating which TCI states are active for each component carrier. 
 
     
     
       32. The method of  claim 31 , transmitting the MAC-CE further comprising:
 transmitting, in the MAC-CE, a first set of bits associated with the first component carrier that indicate which TCI states of the subset of available TCI states are in the first set of TCI states; and 
 transmitting, in the MAC-CE, a second set of bits associated with the second component carrier that indicate which TCI states of the subset of available TCI states are in the second set of TCI states. 
 
     
     
       33. The method of  claim 27 , wherein each of the plurality of component carriers has an associated set of TCI state IDs, and a same TCI state ID for each of the plurality of component carriers in a millimeter wave frequency band has same corresponding spatial quasi-colocation parameters. 
     
     
       34. The method of  claim 27 , wherein each TCI state associated with the plurality of component carriers and bandwidth parts in a sub-6 GHz frequency band uses a same Doppler or delay-related quasi-colocation reference signal as a bandwidth part associated with an activated TCI state. 
     
     
       35. An apparatus for wireless communication at a user equipment (UE), comprising:
 one or more memories; and 
 one or more processors coupled with the one or more memories and configured to cause the UE to:
 receive a medium access control-control element (MAC-CE) that indicates, for a plurality of component carriers configured for the UE, a first set of one or more transmission configuration indicator (TCI) states, wherein the MAC-CE comprises an indication of one or more TCI state identifiers (IDs), each TCI state ID of the one or more TCI state IDs is associated with a first component carrier identified by the MAC-CE and with one or more additional component carriers not identified by the MAC-CE, and wherein the first component carrier and the one or more additional component carriers are of the plurality of component carriers; and 
 activate a same set of TCI states of the first set of one or more TCI states for a subset of component carriers of the plurality of component carriers based at least in part on the received MAC-CE and the indication of the one or more TCI state IDs, wherein the subset of component carriers comprises the first component carrier. 
 
 
     
     
       36. The apparatus of  claim 35 , wherein each TCI state ID of the one or more TCI state IDs is associated with a component carrier identification and a bandwidth part identification. 
     
     
       37. The apparatus of  claim 35 , wherein the one or more processors are configured to cause the UE to:
 identify two or more mappings of TCI states for the plurality of component carriers; 
 receive, in the MAC-CE, an activation command for a first mapping associated with the same set of TCI states from the first set of one or more TCI states; and 
 activate the same set of TCI states based at least in part on the first mapping. 
 
     
     
       38. The apparatus of  claim 37 , wherein the activation command for the same set of TCI states indicates one or more bandwidth part identifications, and an identification of the same set of TCI states. 
     
     
       39. The apparatus of  claim 38 , wherein the first mapping is received from a network entity in radio resource control signaling. 
     
     
       40. The apparatus of  claim 35 , wherein each of the plurality of component carriers having an associated set of TCI state IDs, and a same TCI state ID for each of the plurality of component carriers in a millimeter wave frequency band has same corresponding spatial quasi-colocation parameters. 
     
     
       41. The apparatus of  claim 35 , wherein each TCI state of the first set of one or more TCI states associated with the plurality of component carriers and bandwidth parts in a sub-6 GHz frequency band uses a same Doppler or delay-related quasi-colocation reference signal as a bandwidth part associated with an activated TCI state. 
     
     
       42. The apparatus of  claim 35 , wherein the indication of the one or more TCI state IDs indicates, for which one or more individual TCI state IDs of the one or more TCI state IDs, a corresponding TCI state of the first set of one or more TCI states is to be activated. 
     
     
       43. An apparatus for wireless communication at a network entity, comprising:
 one or more memories; and 
 one or more processors coupled with the one or more memories and configured to cause the network entity to:
 identify a medium access control-control element (MAC-CE) that indicates, for a plurality of component carriers configured for a user equipment (UE), a first set of one or more transmission configuration indicator (TCI) states, wherein the MAC-CE comprises an indication of one or more TCI state identifiers (IDs), each TCI state ID of the one or more TCI state IDs is associated with a first component carrier identified by the MAC-CE and with one or more additional component carriers not identified by the MAC-CE, and wherein the first component carrier and the one or more additional component carriers are of the plurality of component carriers; 
 determine that a same set of TCI states of the first set of one or more TCI states for a subset of component carriers of the plurality of component carriers is to be activated based at least in part on the identified MAC-CE and the indication of the one or more TCI state IDs, wherein the subset of component carriers comprises the first component carrier; and 
 
 transmit the MAC-CE. 
 
     
     
       44. The apparatus of  claim 43 , wherein each TCI state ID of the one or more TCI state IDs is associated with a component carrier identification and a bandwidth part identification. 
     
     
       45. The apparatus of  claim 43 , wherein the one or more processors are configured to cause the network entity to:
 identify two or more mappings of TCI states for the plurality of component carriers; and 
 transmit, in the MAC-CE, an activation command for a first mapping associated with the same set of TCI states from the first set of one or more TCI states. 
 
     
     
       46. The apparatus of  claim 45 , wherein the activation command for the same set of TCI states indicates one or more bandwidth part identifications, and an identification of the first mapping. 
     
     
       47. The apparatus of  claim 43 , wherein the two or more mappings are transmitted in radio resource control signaling. 
     
     
       48. The apparatus of  claim 40 , wherein each of the plurality of component carriers has an associated set of TCI state IDs, and a same TCI state ID for each of the plurality of component carriers in a millimeter wave frequency band has same corresponding spatial quasi-colocation parameters. 
     
     
       49. The apparatus of  claim 43 , wherein each TCI states of the first set of one or more TCI states associated with the plurality of component carriers and bandwidth parts in a sub-6 GHz frequency band uses a same Doppler or delay-related quasi-colocation reference signal as a bandwidth part associated with an activated TCI state. 
     
     
       50. The apparatus of  claim 43 , wherein the indication of the one or more TCI state IDs indicates, for which one or more individual TCI state IDs of the one or more TCI state IDs, a corresponding TCI state of the first set of one or more TCI states is to be activated. 
     
     
       51. An apparatus for wireless communication at a user equipment (UE), comprising:
 means for receiving a medium access control-control element (MAC-CE) that indicates, for a plurality of component carriers configured for the UE, a first set of one or more transmission configuration indicator (TCI) states, wherein the MAC-CE comprises an indication of one or more TCI state identifiers (IDs), each TCI state ID of the one or more TCI state IDs associated with a first component carrier identified by the MAC-CE and with one or more additional component carriers not identified by the MAC-CE, and wherein the first component carrier and the one or more additional component carriers are of the plurality of component carriers; and 
 means for activating a same set of TCI states of the first set of one or more TCI states for a subset of component carriers of the plurality of component carriers based at least in part on the received MAC-CE and the indication of the one or more TCI state IDs, wherein the subset of component carriers comprises the first component carrier. 
 
     
     
       52. The apparatus of  claim 51 , wherein each TCI state ID of the one or more TCI state IDs is associated with a component carrier identification and a bandwidth part identification. 
     
     
       53. The apparatus of  claim 51 , wherein the indication of the one or more TCI state IDs indicates, for which one or more individual TCI state IDs of the one or more TCI state IDs, a corresponding TCI state of the first set of one or more TCI states is to be activated. 
     
     
       54. An apparatus for wireless communication at a network entity, comprising:
 means for identifying a medium access control-control element (MAC-CE) that indicates, for a plurality of component carriers configured for a user equipment (UE), a first set of one or more transmission configuration indicator (TCI) states, wherein the MAC-CE comprises an indication of one or more TCI state identifiers (IDs), each TCI state ID of the one or more TCI state IDs associated with a first component identified by the MAC-CE and with one or more additional component carriers not identified by the MAC-CE, and wherein a first component carrier and the one or more additional component carriers are of the plurality of component carriers; 
 means for determining that a same set of TCI states of the first set of one or more TCI states for a subset of component carriers of the plurality of component carriers is to be activated based at least in part on the identified MAC-CE and the indication of the one or more TCI state IDs, wherein the subset of component carriers comprises the first component carrier; and 
 means for transmitting the MAC-CE. 
 
     
     
       55. The apparatus of  claim 54 , wherein each TCI state ID of the one or more TCI state IDs is associated with a component carrier identification and a bandwidth part identification. 
     
     
       56. The apparatus of  claim 54 , wherein the indication of the one or more TCI state IDs indicates, for which one or more individual TCI state IDs of the one or more TCI state IDs, a corresponding TCI state of the first set of one or more TCI states is to be activated. 
     
     
       57. A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by one or more processors to cause the UE to:
 receive a medium access control-control element (MAC-CE) that indicates, for a plurality of component carriers configured for the UE, a first set of one or more transmission configuration indicator (TCI) states, wherein the MAC-CE comprises an indication of one or more TCI state identifiers (IDs), each TCI state ID of the one or more TCI state IDs associated with a first component carrier identified by the MAC-CE and with one or more additional component carriers not identified by the MAC-CE, and wherein the first component carrier and the one or more additional component carriers are of the plurality of component carriers; and 
 activate a same set of TCI states of the first set of one or more TCI states for a subset of component carriers of the plurality of component carriers based at least in part on the received MAC-CE and the indication of the one or more TCI state IDs, wherein the subset of component carriers comprises the first component carrier. 
 
     
     
       58. The non-transitory computer-readable medium of  claim 57 , wherein each TCI state ID of the one or more TCI state IDs is associated with a component carrier identification and a bandwidth part identification. 
     
     
       59. The non-transitory computer-readable medium of  claim 57 , wherein the indication of the one or more TCI state IDs indicates, for which one or more individual TCI state IDs of the one or more TCI state IDs, a corresponding TCI state of the first set of one or more TCI states is to be activated. 
     
     
       60. A non-transitory computer-readable medium storing code for wireless communication at a network entity, the code comprising instructions executable by one or more processors to cause the network entity to:
 identify a medium access control-control element (MAC-CE) that indicates, for a plurality of component carriers configured for a user equipment (UE), a first set of one or more transmission configuration indicator (TCI) states, wherein the MAC-CE comprises an indication of one or more TCI state identifiers (IDs), each TCI state ID of the one or more TCI state IDs associated with a first component carrier identified by the MAC-CE and with one or more additional component carriers not identified by the MAC-CE, and wherein the first component carrier and the one or more additional component carriers are of the plurality of component carriers; 
 determine that a same set of TCI states of the first set of one or more TCI states for a subset of component carriers of the plurality of component carriers is to be activated based at least in part on the identified MAC-CE and the indication of the one or more TCI state IDs, wherein the subset of component carriers comprises the first component carrier; and 
 transmit the MAC-CE. 
 
     
     
       61. The non-transitory computer-readable medium of  claim 60 , wherein each TCI state ID of the one or more TCI state IDs is associated with a component carrier identification and a bandwidth part identification. 
     
     
       62. The non-transitory computer-readable medium of  claim 60 , wherein the indication of the one or more TCI state IDs indicates, for which one or more individual TCI state IDs of the one or more TCI state IDs, a corresponding TCI state of the first set of one or more TCI states is to be activated.